OMA-206P

OMA-406R

Explosion-Proof Models

The OMA-300 is offered in two explosion-proof formats:

Eexp

Eexp systems are purged and pressurized using a certified air-purging device. This method ensures that toxic/explosive gas is not allowed to accumulate inside the enclosure, and is ideal when instrument air is available.

Eexd

Eexd systems are contained within certified explosion-proof cast-aluminum enclosures. This method is more practical if the installation is remote or utilities are unreliable.

Applications

Aromatic hydrocarbons like benzene, toluene, and xylene are carcinogenic compounds. This has implications for a wide range of industrial processes: aromatic hydrocarbon emissions are highly regulated, and products like fuel, glue, detergents, and various solvents are required to meet a specified maximum level of aromatic content.

Fortunately, aromatic hydrocarbons have strong absorbance in the UV range and can be easily measured through spectroscopic methods. The laboratory standard ASTM method D1017-51 uses UV spectroscopy for aromatic hydrocarbon analysis; the OMA system takes the same principle and brings it to the field for continuous, fast-response analysis on site.

Using a dispersive UV-Vis spectrophotometer, the OMA BTX Analyzer continuously measures absorbance at each integer wavelength in the 200-300 nm range — the spectral region in which common aromatic hydrocarbons have very prominent, distinct absorbance curves. This allows the OMA BTX Analyzer to easily differentiate the absorbance of each compound from the total sample absorbance.

Proven Applications

Technology

Principle of Operation

To analyze the chemical composition of the sample, the OMA uses an analysis method known as ultraviolet-visible (UV-Vis) spectroscopy. The system measures absorbance from 200nm to 800nm and quantifies the amount of light absorbed by the sample at each integer wavelength; the OMA plots this raw data to visualize a high-resolution absorbance spectrum. Learn more

The OMA uses a long-life xenon light source to transmit a signal through the sample fluid in the flow cell. The signal is carried by fiber optic cables from the analyzer to the flow cell, where the chemical mixture of the sample has unique interactions with the light based on its current composition. Learn more

Aromatics' Absorbance Spectra

To simultaneously measure benzene, toluene, and xylene, the OMA detects the distinctive absorbance curves of the analytes and mathematically isolates their structures from the total sample absorbance. In accordance with Beer-Lambert Law, the OMA correlates the height of these curves directly to real-time concentrations. The BTX or total aromatics' reading can be configured as a sum of the individual concentrations.

Absorbance Curves: BTX

Benzene

Toluene

Xylene

Absorbance (AU)

Wavelength (nm)

User Interface

Our proprietary ECLIPSE software processes the raw spectral data to provide real-time concentration readings. The operator can easily navigate between views (trendgraph, spectrum, and more) using intuitive touch-screen navigation. You can also configure alarms, data logging, and outputs. Learn more

Inherent Safety

Most analyzers draw the process sample directly into the analyzer enclosure for analysis, which is dangerous if the sample fluid is toxic, explosive, or corrosive. The OMA design is unique: we bring the light to the sample, not the other way around. The sample circulates through the external flow cell, which receives the signal via fiber optic cables. Learn more

Sampling

The OMA is built for direct analysis of the hot/wet sample, thus simplifying the scope of the sample system and retaining high sample integrity. From our vast experience in sampling design, we know that applications can be similar but are rarely identical. For this reason, we design and build sample conditioning systems on a project basis, working from the process to the drawing board.

Specifications

Note: All performance specifications are subject to the assumption that the sample conditioning system and unit installation are approved by Applied Analytics. For any other arrangement, please inquire directly with Sales.